I Need To Know What Type Of Doctor Do I

I need to know what type of doctor do I go see to diagnose my upper leg pain I've been getting off and on for a few months now. I heard it may be sciatic from my friend,but not sure. Its at the top if my right leg,on the front and inside. Not in the back which I read us where sciatic pain affects the leg. Sometimes its a light pain and sometimes its bad. And sometimes it makes my leg go out and I can't walk ,but just for a minute